separating format conversions into separate file, provided to lib as a parameter

Author: catdad

formats-node.js

@@ -0,0 +1,21 @@
+const jpegJs = require('jpeg-js');
+const { PNG } = require('pngjs');
+
+module.exports = {};
+
+module.exports.JPEG = ({ data, width, height, quality }) => jpegJs.encode({ data, width, height }, quality).data;
+
+module.exports.PNG = ({ data, width, height }) => {
+  const png = new PNG({ width, height });
+  png.data = data;
+
+  return PNG.sync.write(png, {
+    width: width,
+    height: height,
+    deflateLevel: 9,
+    deflateStrategy: 3,
+    filterType: -1,
+    colorType: 6,
+    inputHasAlpha: true
+  });
+};

index.js

@@ -1,5 +1,6 @@
 const decode = require('heic-decode');
-const { one, all } = require('./lib.js')(decode);
+const formats = require('./formats-node.js');
+const { one, all } = require('./lib.js')(decode, formats);
 
 module.exports = one;
 module.exports.all = all;

lib.js

@@ -1,27 +1,6 @@
-const jpegJs = require('jpeg-js');
-const { PNG } = require('pngjs');
-
-module.exports = decode => {
-  const to = {
-    JPEG: ({ data, width, height, quality }) => jpegJs.encode({ data, width, height }, quality).data,
-    PNG: ({ data, width, height }) => {
-      const png = new PNG({ width, height });
-      png.data = data;
-
-      return PNG.sync.write(png, {
-        width: width,
-        height: height,
-        deflateLevel: 9,
-        deflateStrategy: 3,
-        filterType: -1,
-        colorType: 6,
-        inputHasAlpha: true
-      });
-    }
-  };
-
+module.exports = (decode, encode) => {
   const convertImage = async ({ image, format, quality }) => {
-    return await to[format]({
+    return await encode[format]({
       width: image.width,
       height: image.height,
       data: image.data,
@@ -30,8 +9,8 @@ module.exports = decode => {
   };
 
   const convert = async ({ buffer, format, quality, all }) => {
-    if (!to[format]) {
-      throw new Error(`output format needs to be one of [${Object.keys(to)}]`);
+    if (!encode[format]) {
+      throw new Error(`output format needs to be one of [${Object.keys(encode)}]`);
     }
 
     if (!all) {